Its revive PNG. Its attached to the post, but doesn't show in the post. They changed it to the default one in MV (item 4 in a new project).
I just did some testing in my own clean project (turned all my plugins OFF) and I noticed very similar behavior, actually. Alive actors can be chosen as the target of a "1 Ally Dead" skill, but the skill will do nothing when it hits them (at least when they're alive). Like you surmise, it might be intended design under the assumption that the target could die before the skill is actually used.It is not, since it doesn't work in projects without any plug-in in it.
I would like to clarify that it works in the menu but not in the battle.
Edit: Can this be intended design so characters can "pre-use" a revive spell or item before a character is dead and revive them on the same turn?
Probably a bug, my 2nd post has 2 attachments.That picture was an example given by MysticEnigma, unless there's a bug on my end.
Can confirm that Yanfly's Battle Core solved this issue, thanks!I think Yanfly's Core Engine or Yanfly's Battle Core might stop you from targeting alive actors with dead-ally skills, since when I tried to use that skill on them in my full-plugin test project, it wouldn't allow me to target an alive actor.